Lewy body variant of Alzheimer’s disease or cerebral type Lewy body disease? Two autopsy cases of presenile onset with minimal involvement of the brainstem
Identifieur interne : 001026 ( Main/Exploration ); précédent : 001025; suivant : 001027Lewy body variant of Alzheimer’s disease or cerebral type Lewy body disease? Two autopsy cases of presenile onset with minimal involvement of the brainstem
Auteurs : Osamu Yokota ; Kuniaki Tsuchiya ; Toshiki Uchihara ; Hiroshi Ujike ; Seishi Terada ; Mafuyu Takahashi ; Yuji Kimura ; Hideki Ishizu [Japon] ; Haruhiko Akiyama ; Shigetoshi KurodaSource :
- Neuropathology [ 0919-6544 ] ; 2007-02.
English descriptors
Abstract
Lewy bodies (LB) usually extend from the brainstem to the cerebrum in patients with Parkinson’s disease. However, whether the patterns of progression of LB and neuronal loss in Parkinson’s disease are identical to those in other Lewy body diseases (LBD) remains unclear. In addition, pathological data on the autonomic nervous system involvement in LBD are limited. We present here the clinicopathological characteristics of two autopsy cases with both Alzheimer’s disease and dementia with Lewy bodies (DLB), possibly diagnosed as having Lewy body variant of Alzheimer’s disease (LBV/AD). Our patients presented clinically with dementia without parkinsonism. Histopathologically, phosphorylated α‐synuclein‐positive LB and Lewy neurites were abundant in the limbic system, especially in the amygdala, and to a lesser degree, in the neocortex, including the primary motor cortex. The amygdala was also most severely affected by neuronal loss, and the other limbic areas and neocortex were affected to a lesser degree. Despite the existence of a small number of LB and many Lewy neurites, neurons in the brainstem nuclei were relatively well preserved. The Braak stages of concurrent neurofibrillary changes and senile plaques were stage V and C, respectively, in both cases. Tyrosine hydroxylase‐positive nerve fibers were relatively well spared in one case examined compared with Parkinson’s disease cases. Furthermore, many Lewy neurites immunopositive for phosphorylated α‐synuclein were found in the nerve fascicles of the epicardium in one case examined and in Parkinson’s disease cases to a lesser degree. These findings suggest that: (i) in at least some LBV/AD cases, the amygdala develops neuronal loss and Lewy‐related pathology prior to the brainstem nuclei; and (ii) the depletion of nerves in the heart tissue of LBV/AD is not necessarily complete despite the development of Lewy‐related pathology.
Url:
DOI: 10.1111/j.1440-1789.2006.00736.x
Affiliations:
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Le document en format XML
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<front><div type="abstract" xml:lang="en">Lewy bodies (LB) usually extend from the brainstem to the cerebrum in patients with Parkinson’s disease. However, whether the patterns of progression of LB and neuronal loss in Parkinson’s disease are identical to those in other Lewy body diseases (LBD) remains unclear. In addition, pathological data on the autonomic nervous system involvement in LBD are limited. We present here the clinicopathological characteristics of two autopsy cases with both Alzheimer’s disease and dementia with Lewy bodies (DLB), possibly diagnosed as having Lewy body variant of Alzheimer’s disease (LBV/AD). Our patients presented clinically with dementia without parkinsonism. Histopathologically, phosphorylated α‐synuclein‐positive LB and Lewy neurites were abundant in the limbic system, especially in the amygdala, and to a lesser degree, in the neocortex, including the primary motor cortex. The amygdala was also most severely affected by neuronal loss, and the other limbic areas and neocortex were affected to a lesser degree. Despite the existence of a small number of LB and many Lewy neurites, neurons in the brainstem nuclei were relatively well preserved. The Braak stages of concurrent neurofibrillary changes and senile plaques were stage V and C, respectively, in both cases. Tyrosine hydroxylase‐positive nerve fibers were relatively well spared in one case examined compared with Parkinson’s disease cases. Furthermore, many Lewy neurites immunopositive for phosphorylated α‐synuclein were found in the nerve fascicles of the epicardium in one case examined and in Parkinson’s disease cases to a lesser degree. These findings suggest that: (i) in at least some LBV/AD cases, the amygdala develops neuronal loss and Lewy‐related pathology prior to the brainstem nuclei; and (ii) the depletion of nerves in the heart tissue of LBV/AD is not necessarily complete despite the development of Lewy‐related pathology.</div>
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